Thanks Alexander yes , the first paragraph of your answer completely is my question . how do they send email with the users that are not exist on the domain , and spam other domains . so there is no way to prevent this ? unless bloking outgoing email of innocent-domain.com well , most of my problems are related to the users that are not exist on that particular website, and if you introduce me document that shows how do they do this I will be appreciate . and I didn't undersand matthew suggestion about forging the form address !!! how do they forge the address , and would you please send me some links to good documents so i can improve myself in spam and email problems . thanks Dalloz wrote: Am Mi, den 15.12.2004 schrieb Littleguru um 23:29:I know that I can block the source of spam attack through firewall , but what can I do about the sites that have been triggered to send spam .the site is innocent but spammers are using it for sending spam , so I dont want to suspend that site. Do you know how to accomplish this, and how they trigger another site to send spam ? and how we can prevent this ? any link , help or hint will be greatly appreciated.I am not very sure whether I understand what you have in mind and ask help for. So don't mind asking for being sure: you mean you have for instance a domain registered innocent-domain.com. Then a spammers comes along a sends his messages with addresses @innocent-domain.com. The bad side: you will get more or less bounces and maybe even complaints by annoyed recipients. Do you speak of this case? My answer then: you can't do anything against that. I don't understand which role "website" plays in your understanding. Maybe you think about spammers are grabbing valid email addresses from websites. Against this you can act by not putting valid email address formats in the source code of your web sites. Different solutions (scripts) are available for this, so that a regular website visitor has not a real problem to mail you feedback. Alexander |